The test's doc named knowledge::ensure_webhook as one of two hive-side
reapers. That function is gone; its replacement matches the full URL and
cannot touch another hive's hook.
The assertion arm stays. The hazard is not what this repository's source
says, it is what is deployed — a hive still running the previous version
reaps by suffix until it is upgraded, so the arm guards the transition
rather than a current code path. Recorded when to drop it.
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